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Proceedings ArticleDOI

Some melting layer characteristics at two tropical locations in Indian region

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TLDR
In this paper, a modification in the rain attenuation model taking into account the melting layer height variation with the season and rain rate was proposed, which may not be valid for tropics.
Abstract
Hydrometeors pose a serious threat to satellite communication operating above 10 GHz. The designing line of sight link usually is based on the ITU-R models, which are often inadequate for tropical region. ITU-R model uses a yearly averaged constant rain height for the attenuation calculation, which may not be valid for tropics. This paper reports the study of rain height based on Micro Rain Radar and Radiosonde observations at two tropical locations in Indian region. Results suggest a possible modification in the rain attenuation model taking into account the melting layer height variation with the season and rain rate.

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Citations
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Journal ArticleDOI

Characterization of Maximum Radar Reflectivity Height During Stratiform Rain Events

TL;DR: In this paper, a statistical characterization of the time and space variability of the maximum reflectivity height during stratiform rain events was presented, and the dependence between simultaneous meteorological parameters derived from weather radar and from surface automatic weather observation stations at local scale in a temperate climate region.
Journal ArticleDOI

Temporal evolution of atmospheric parameter-profiling on rain height over two geoclimatic regions in Nigeria

TL;DR: In this paper, the temporal variation of rain heights in the Sub-Sahelian and Coastal regions of Nigeria using six (6) years Tropical Rain Measuring Mission Precipitation Radar (TRMM-PR) reprocessed data retrieved from the Global Precipment (GPM) constellation Satellites and Era-Interim Field of the European Centre for Medium-Range Weather Forecast (ECMWF).
Journal ArticleDOI

Distribution of rain height over subtropical region: Durban, South Africa for satellite communication systems

TL;DR: In this paper, the three-parameter Dagum distribution of the rain height over Durban, South Africa was used to study the monthly, seasonal, and annual variations using the parameters estimated by the maximum likelihood of the distribution.
Journal ArticleDOI

Determination of Melting Layer Boundaries and Attenuation Evaluation in Equatorial Malaysia at Ku-Band

TL;DR: In this paper, the vertical reflectivity of rain profile for UTM, Malaysia was estimated to be 13.36 dB and 15.44 dB at 0.01% of the time exceeded using Laws-parsons and Marshall-Palmer regression coefficients, respectively.
Proceedings ArticleDOI

Modeling freezing height level for satellite link communication: Durban, South Africa

TL;DR: It was observed that 3-Parameter Dagum (Dagum) distribution performs better over the next most suitable distribution (3-Parameter Log-logistic) for the modeling of freezing height level over Durban with improvement of 0.94% in Bias error, 0.48% Root Mean Square Error and 7.43% Kolmogorov-Smirnov test (K-S test).
References
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Journal ArticleDOI

Doppler radar characteristics of precipitation at vertical incidence

TL;DR: In this article, a comprehensive review and extension of the theoretical bases for the measurement of the characteristics of rain and snow with vertically pointing Doppler radar are presented, where the drop size distribution in rain can be computed from the Doppher spectrum, provided that the updraft can be estimated, but difficulties are involved in the case of snow.
Book

Electromagnetic Wave Propagation Through Rain

TL;DR: In this article, the effects of rain on weather and climate models are discussed, and an approach to attenuation mitigation via diversity via diversity is proposed. But this approach is not suitable for outdoor environments.
Journal Article

Rain observations with a vertically looking Micro Rain Radar (MRR)

TL;DR: Simultaneous estimates of rainrate and reflectivity factor with data of a C-band (frequency 6 GHz) weather radar suggest that the MRR may be used to support quantitative rainrate estimates with weather radars.
Journal ArticleDOI

Radar Observations and Simulation of the Melting Layer of Precipitation

TL;DR: In this article, the melting layer in precipitation is physically modeled and compared with high resolution Doppler radar data, which includes a new formulation of the dielectric properties and can handle all ice particles with densities ranging from pure snow to hail.
Journal ArticleDOI

Propagation impairment on Ka-band satcom links in tropical and equatorial regions

TL;DR: In this article, a review of the deficiencies and their likely impact on system performance is presented, highlighting difficulties and encouraging realistic expectations and examining the question of whether costly, application-specific measurement programs might now be avoided by mining increasingly sophisticated national meteorological records.
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